Hi, I am apparently a new user of CFDEM. I have two issues:
#1
I wanted to insert a large number of particles 100000, with radius 0.0005 in cgs unit system and wanted to insert few at some interval. Therefore, I used the following in my init script
fix ins all insert/pack seed 32452843 distributiontemplate pdd1 vel constant 0. 0. -3. insert_every 10000 overlapcheck yes all_in yes particles_in_region 100000 region bc
but I saw that all the particles are being inserted at the same time. I followed the piso Scalar packed bed Temp case as my reference. What am I missing here?
#2
I want to use cgs unit and trying to simulate fluidization. My SI case runs well. I wanted to check if my cgs case runs as well. So I converted all my values to cgs accordingly: (Young's modulus 5e6 to 50e6---this should be the case, right?)...0.0005m to 0.05cm. I changed velocity script as well from m to cm. Then I appended my controldict with the CGS constant as per the ErgunMPI_cgs tutorial. But my fluidization now occurs at the beginning. For my cae fluidization was supposed to occur at 2 m/s but it happens below 50 cm/s (as per my input script U(I am guessing if I input U value 50 at a time step that is in 50 cm/s)) now. I don't know why they are different. They should be the same as I have just converted the unit only.
Lowered | Wed, 04/03/2019 - 14:37
Are you sure you changed all
Are you sure you changed all the measurements in your system? Starting from domain size, density, gravity...
which unit system do you use for OpenFOAM part?